head to head · open source
Open WebUI vs pentestagent
Open WebUI has 152,394 GitHub stars, 22,296 forks, 294 open issues and last shipped yesterday. pentestagent has 3,083 stars, 613 forks, 30 open issues and last shipped 11 days ago. Open WebUI leads on adoption by 4,843% (152,394 vs 3,083 stars). Open WebUI is written in Python under a custom or non-standard licence; pentestagent is written in Python under MIT. Open WebUI has attracted 15% as many forks as stars, pentestagent 20%. Open WebUI was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, llm), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Open WebUI | pentestagent | |
|---|---|---|
| GitHub stars | ★ 152K | ★ 3.1K |
| License | Custom / other | MIT |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-09-07 |
| Forks | ⑂ 22K | ⑂ 613 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Open WebUI if
- You weight community size — 152K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick pentestagent if
- You want the pentestagent feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and pentestagent fits your workflow better
About Open WebUI
Open WebUI is a self hosted, open source AI interface that unifies access to local and cloud based large language models. It runs entirely in a web browser and supports Ollama for local model hosting alongside any OpenAI compatible API, including services like LMStudio, GroqCloud, Mistral, and OpenRouter. Built in Python, it functions as a drop in replacement for proprietary AI platforms, giving users full control over their model infrastructure and data.
read the full Open WebUI overview →
About pentestagent
PentestAgent is Python based AI agent framework for black box security testing. Project lives in AI & Machine Learning / AI Interaction & Interfaces ecosystem. It supports bug bounty, red team, and penetration testing workflows. It provides terminal user interface, Docker tool execution, multi agent orchestration, and model access through OpenAI, Anthropic, or other LiteLLM supported providers.
read the full pentestagent overview →
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Frequently asked questions
Is Open WebUI or pentestagent more popular?
Open WebUI has 152,394 GitHub stars and pentestagent has 3,083. Open WebUI has the larger community by that measure.
Are Open WebUI and pentestagent free?
Both are open source. Open WebUI has no licence declared in this registry, and pentestagent is licensed under MIT. Both are free to self-host.
What is the difference between Open WebUI and pentestagent?
Open WebUI is written in Python and pentestagent in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Open WebUI or pentestagent?
Choose Open WebUI if you want the larger community (152,394 stars) or its Custom / other licence terms. Choose pentestagent if its feature set, stack or MIT licence fits better. Both are self-hostable.